Electric bell.



A. LUNGEN.

ELECTRIC BELL. APPLICATION FILED DEC. 4, 1909.

Z w 4 A F 1 .m n M a D...

ATTORNEYS constitute supports for an srarns rA'r NrorFroE. g

n. Y., assrenon 'ro E'nwanns & co. me, or New YORK,

Specification o'f 'Letters l atcnt.

Patented Feb. 43, 1913.

Application filed December 4, Serial No. 531,323.

To all whom it may concern:

Be it known that I, ADAM LiiNoEN, a citizen of the United States, and a resident of the city of New York, borough of the Bronx, in the county and State of New York, have invented a new and Improved Electric Bell, of which the following is afull, clear, and exact description.

This invention relates to certain improvements in electric bells of the type in which the hammer is vibrated by the vibration of the armature of an electromagnet. In certain bells of this kind, it is common to provide a cover or casing to protect and 'conceal the operating parts which vibrate the.

hammer, and one object of my invention is to so construct these parts in respect to the cover that the cover will moreefiectively exclude dust, dirt and insectsfrom said parts. By pivoting the hammer adjacent the side wall of the casing through which said hammer extends, the opening in the'wall maybe made only very slightly larger than the hammer, as move an almost negligible point during its oscillation.

A further'object of the invention is to distance at this facilitate the assembling of the parts'of the bell, by forming the body and the supports for all of the operating parts, from a single piece of sheet metal. The base is-formed with various extensions integral therewith and accurately formed by dies, so that they "all of the working parts. In assembling the bell, it is unnecessary to perform delicate adjustments by hand or exercise care in the positioning of the parts, as the positions of the supports are accurately and automatically determined by the dies used in stamping out the base.

A further object of my invention is to simplify the armature-retaining spring and;

be made of a' singlepiece ofmetal secured 3 "tures ofconstruction, allot-which will be circuit-breaking device, by forming both of these members as springs secured to the armature adjacent the pivotal point of, the and contacting at their free ends with mg up from the base. The two springs may in place by.

singlepoint. Y.

' The invention involves various other fea-J a single operation, and at a set forth more fully hereinafterv and pointed out particularly in the claim.

at a point closely the hammer'will It is of course understood that the two specific forms illustrated and described in detail, are merely two embodiments which my invention may-assume, and that various changes may be made in the construction and arrangement of the parts without de-- parting from the spirit of my invention.

Reference'is to be had to the accompany ing drawings, forming a part of this specification, in whichsimilar characters of reference indicate-corresponding parts in all the f figures, and in which Figure 1 s a rear view of a bell constructed in accordance with my invention; Fig. 2 is 'a front view, I he casing being shown in section; Fig. 3' view of the base'and the tegral therewith; Fig. 4 is-a longitudinal section on the line 4-4 of Fig. 2; Fig. 5 is a transverse section on ,the line 55 of Fig. 2; Fig. 6 is a rear view similar to a portion of Fig. 1, but showing a bell'having the circuit insulated from the base; and Fig. 7 is a front view of a portion of the bell shown ,in Fig. 6, the parts not shownv beingsimilar to the corresponding. parts employed in-the form illustrated in igs. l to 5, inclusive.

In the-bell illustrated in Figs. 1 to 5, inelusive, I employ a base 10, formed of sheet metal and having the supports for the various operating parts of the bell formed integral with said base. About the peripheryof the base is a supporting flange 11, for hold- 4 ing the bodyportion of the base out of engagement with the supporting wall, the

flange being unbroken throughout its length,

so that when the vbase isplaced against a wall, no dust, dirt or foreign bodies can gain access to the spacebehind the base. w At.

one edge of the flange. there is'a tongue 12 having the pgrtion adjacent the flange lying I in'the plane of the edge of the flange, so asto contact-with the supporting surface or wall, and having the outer or free end "of the tongue "bent upwardly and outwardly from said plane as illustrated particularly m Fig. 3. -The .free' end of the tongue is formed in any suitable manner to adapt it.

to support a gorfg 13, .so that the free'edge of the gong Willcome adjacent to "but spaced from the edge of the base. v

The'body of, the base adjacent one edge thereof is provided witha vU-shaped slot" which defines a tongue or flange 14,, struck up, so as to stand-at right angles to the plane of the base, and parallel to one side thereof to constitute a support for the electromagnets. Adjacent the opposite side another slot is formed'to define a tongue or flange 15, struck up to stand at right angles to the plane of the base and in a plane at right angles to the plane of the flange 14. This flange 15 has a terminal flange 16, bent to lie parallel to the base 10 and having one end extending out beyond the edge of the flange 15. This terminal portion of the flange 16 is provided with an opening 17, and the base is provided with a similar opening 18 adjacent one edge of the base of the flange 15. The two openings 17 and 18 are in axial alinement, and a line throu h the two openings is at substantially right angles to the plane of the base, and they constitute a bearing for the armature and hammer hereinafter referred to.

At another point on the base and adjacent the side opposite to the tongue 12, a tongue or flange 19 is struck up at right angles from the ibase to constitute a stop for the armature-retaining spring. Intermediate the flanges 15 and 19, the base is provided with an opening 20 formed with tongues 21 adjacent each end thereof. These tongues are bent downwardly from the base rather than upwardly, as are the other tongues, and.they serve to hold in place a strip or plate of insulating material. Adjacent one side of the base, there are provided two slots or openings 22, and

at the opposite side there is a slot or open ing 23, by meansof which the cover or casing is-secured in place. The base portion of the tongue 12 is provided with an open ing 24, and the base 10 adjacent the side thereofopposite to said tongue is providedwith an opening 25, through which suitable screws may extend to fasten the bell to the supporting wall. At the lower corners of the base, there are suitable openings 26 and 27, within whlch are secured the two binding postsof the bell.

The base with all of its tongues, flanges,

supports and openings, is formed from a single piece of sheet metal, and is preferably formed by the use of suitable dies in a stamping and forming press. "In this manner, all of the .parts will be positioned withabsolute accuracy, and in attaching the operating devices to the base noparticular care need be employed, as the several operating parts must come in proper position in respect to each other, as the supporting flanges of the base are comparatively 1mmovable in respect to each other.

To the flange 14, I secure two electromagnets 28 and 29,,so as to lie with their cores at right angles to the base. Each magnet is secured in place by a single screw extending through an opening formed in the flange 14. An armature 30 is provided with oppositely-disposed tru'nnions or pivot pins which extend into the openings 17 and 18 and pivotally hold the armature adjacent to but spaced from the free ends of the mag-net cores. The armature is formed integral with or rigidly'secured to an arm 50 of the hammer, the in operative relationship to the bell. As illustrated, the hammer is within the bell, although it is of course evident that the hammer may be placed outside if desired.

In engagement with the rear side of the base at one corner thereof, there is provided a sheet or plate of insulating material 31, held in place by the two tongues 21, whichextend through the sheet of insulating material and are folded back into engagement with the under surface of the latter. The sheet 31 covers the opening 20 and serves to support the stop of the vibrator or circuit breaker.. This stop is in the form of a middle tongue 32 extending through the sheet and upwardly therefrom substantially at right angles to the plate and through the opening 20. On the under side of thesheet, the stop is bent to lie along said under side and its opposite side .is bentupwardly through a second opening in the sheet 31 arpd clenched into engagement. with the upper surface again. This is most clearly shown in Fig. 5. The stop is thus supported entirely by the sheet and is insulated. thereby and is substantially parallel to and adjacent the upwardly-extending tongue or stop 19. The operation of the stop 32 which head of which is disposed is on the under side of the sheet 31, serves v to firmly bind into engagement with the latter, the free and uninsulated end of a wire 33, so that the simple stamping operation of attaching the stop to the sheet, also serves to attach the wireto said-stop. The free end of the wire 33 leads to one of the two coils which are wound in series, and the terminal of the other coil is connected by a wire 34 to a binding post 35, which extends through the sheet 31 and the opening 27 and isinsulated from the base.

For controlling the movement of the armature and for making and breaking the circuit, I provide two springs 36 and 37. These two springs are formed fro-m a single piece of metal secured to the armature by a single rivet adjacent the pivotal support of the armature. The spring 37 extends outwardly beyond the spring 36, and'the lastmentione d spring is preferably formed as atongue struck up from the center portion of the spring 37 and separated therefrom by two substantially parallel slits connected together at the end opposite to the pivot. The two springs extend between the two stops 32 and 19, and when the coil is deenergized 36 presses against'the opposedside of the stop 32. As the coil is'energized to attract the armature, the springs are carried by the armature and the spring-36 is swung away from. the stop 32, so as to break the circuit. The spring 37 is put under added stress, so that as soon as the current is brokenand the magnet deenergized, this spring neturns the armature to its normal position. The spring 37 serves not only as an armature-returning spring, but also serves as alconductor and as a part of the electric circuit. The circuit flows from the binding post 35 through the wire 34 to the, coils and thence through the wire 33 to the stop 32. This stop is in normal contact with the spring 36, and the spring 37 which is integral with the spring 36, is in contact with the stop 19. This stop being integral with the base, is of'course electrically connected to the other binding post 38. To prevent the turning of the binding-post 38 during the tightening or loosening of the nut thereon, the head of the binding post is preferably in the form of a screw head with .fiat sides, as illustrated in the lower lefthand corner of Fig. 1, and the base is formed with ridges-'39, between which thishead is received. With the head in position, the nut on the binding post may be tightened or loosened at will, without possibility of rotating the body of the post.v Upon closing .the circuit outside of the bell, the current flows as above indicated, and the armature is attracted to strike the, belly This -movement of the armature breaks the contact be Q tween the spring 36 and. the stop 32, and the magnets become denergized and the spring 37 returns the armature and ree'stablishes the complete circuit. i

For concealing. andproteoting the operating parts of the bell, that is, thelnr tgnets, armature and vibrating or circuitclosi spring 36, a casing 40 is provided, which has two tongues 41 for entry through the two openings 22 in the base, and a third tongue 42 for entry through the opening 23,

so ,as to detachably hold the casing. One

wall 43 of the casing, that is, the wall on the side of the operating parts toward the gong, is provided with an, opening '44,

through which extends the hammer 50. This.

wall, as will be noted from Figs. 2 and 4, comes closely'adjacent the pivotal support of the hammer, and the hammer at this point is substantially in the form of awire.

At the pivotal support of the hammerand armature, there is no lateral movement, and the movement of the hammer at the point where the hammer passes through the opening 44, is so slight that the opening made only very slightly larger than the hammer itself. The free space around the ha-mmer is not sufficient to permit the entrance of any appreciate quantity of dust, and to pre-,

of short'circuitor loss of current.

vent the entrance of insects which. often secrete themselves within the dark interior of.

electric bell casings. As this opening 44 is the only opening leading tothe interior .of

the casing, and .as the casing fits the base and the base fits the wall, it is evident that no foreign bodies can-gain access to the interior of the casing to injuriously aflect the operation of the bell.

In the bell illustrated inv Figs. 1 'to 5,

inclusive, the casing itself forms a part of 20. '-A stop 19 extends up through the sheet of insulating material 31, concentric 'withthe opening 45 and out of engagement there-- with, as illustrated in Fig. 7, and the lower end of the stop extends in the form of a bar 46'along the under side of the'sheet 31 to the corner binding post 35. Thecenter bolt.

of this binding post not,only serves to support the bar 46 and to hold it in place, but it is electrically connected to the bar and theholding of the bar in place holds the stop 19 in place. A wire 34 leading from the coil of the magnet instead of'connecting to the binding post 35, leads to the binding post 38, which latter is insulated from-the base 10' of the bell by a sheet47 of insulating material. This changing of the binding post does not affect the operation of the bell, except that it reverses the direction of the current if the wires leading tothe bell be the same.

The spring 37 and the vibrator 36 are 1 formed of the same piece of metal as in the form first described, but instead of being directly connected to the armature, I cover. the side of the armature with a strip of insulating material, so that neither of the parts '36 or 37 is in electrical contact with the. armature, but with the supporting parts 15 and 16.

By the construction/illustrated in Figs. 6 and from the base, and the case mav'thusbe mounted on a metallic wall without danger In the form shown in'these figures, there is also embodied a slightly different means for se-.

curing the wire 33 to the stop 32. The base portionof the p DIOVIClGd' 'with'two wrongs or fingers 483 having e r free ends resiliently held in engagement with .the"

under side of the insulation 31, and these spring fingers or prongs resiliently hold the 7, the circuit is completely insulated J end of the Wire 33. This permits the removal of the wire without loosening the stop 32.

Having thus described my invention, I claim as new and desire to secure by Letters Patent: Y V

In a device of the character described, a metallic base formed with a bent up stop, a bent up magnet support, a bent up journal support, and a" pair of holding fingers bent down from the base, a sheet of insulating material arranged on the under side of said case for covering the space from which said fingers are removed. said fingers extending through said sheet of insulating material with parts thereof extending parallel with the insulation for holding the insulation against said base, an electrolrfagnet supported by said magnet support, an armature n having a pivotal member journaled in said journal support and said base, a spring formed with a tongue pressed therefrom rigidly secured at one end to one end of said armature and arranged so that the free end will engage the stop pressed up from said base, a contact rigidly secured to said insulation adapted to normally engage the tongue pressed from said spring, and means defining a circuit for said magnet including said spring and said contact.

Intestimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ADAM LI'T GEN,

Witnesses: I

LOUIS K. SPIER,

CHAS. .F. ELLERMAN. 

